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Patented'Feb. 23,1897.

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MEANS 0R APPARATUS FOR BURNING ILLUMINATING GAS. A No. 577, 77. Paten ted Feb. 23, 1897.

THEODORE BIRNBAUM, OF LONDON, ENGLAND.

MEANS OR APPARATUS FOR BURNING lLLUMlNATlNG-GAS.

SPECIFICATION forming part of Letters Patent No. 577,677, dated February 23, 1897. Application filed August 17, 1896. Serial No. 603,011. (No model.)

To all whom it may concern:

Be it known that I, THEODORE BIRNBAUM, india-rubber manufacturer, a subject of the Queen of Great Britain, residing at \Vick Lane Rubber Works, Bow, London, in the county of Middlesex, England, have invented certain new and useful Improvements in Means or Apparatus for Burning Illuminating-Gas, of which the following is a specification.

This invention relates to means or appara tus for use in burning gas for illumination, particularly adapted for factories and other places where explosive vapor or gases may at times be present, to be herein particularly described, reference being had to the accompanying drawing.

The figure shows by a vertical sectional elevation an arrangement of apparatus adapted for carrying out my invention.

a is a pipe of supply for the illuminatinggas to be burned, and this pipe may, if desired, be made the means of support for the entire apparatus, or this can be otherwise contrived. This pipe passes, with the interposition of suitable packing material or closing contrivances, through a (by preference) glass or other transparent globular or semiglobular shade b at the lower part, the globular shade I) being securely held by the dished flange 00 upon the supply-pipe a. The burner employed, although here shown as an ordinary incandescent-gas-lighting burner, may be of any suitable form and construction. Within this globe I have shown for the Bunsen burner an inlet or inlets c for air, such as for that type of burner needs to be provided for supply and admixture of air With the gas to be burned. Within this globe and around the pipe is applied a chimney d of transparent material, as fine mica, (glass being liable to fracture,) and the pipe terminates in a suitable burner e, covered with a mantle f, which may be of the ordinary character employed for incandescent-gas illumination. The upper open part of the globe is closed by means of a metal or similarly refractory cylinder h, resting on or supported by a cap or support.

mica or other suitable translucent or trans- The cylinder may be of.

parent material, and the cylinder-cap rests upon an annular piece or ring g of perforate material sufficiently fine to prevent ignition taking place through its interstices. For this purpose I prefer miners Wire-gauze. At the upper end the cylinder h, which extends for some distance above the inclosed globe, is fitted at its upper end or outlet with a hoodz' of like material, (say miners wire-gauze.) I sometimes provide a spreader 70 above the open end of the ordinary chimney d to the better diffuse the heated-air current.

Air to support combustion of the gas at the burner passes in at the openings in the annular piece 9 and thence down through the closed bowl 5 to the openings 0 and to the base of the chimney (1. Air also passes up between this chimney d and the cylinder h for the cooling purpose stated.

The products of combustion and heated air pass up and away through the interstices of the hood 1', while passage of flame is prevented and downdraft avoided.

Although the drawing shows what is commonly known as an incandescent gasburner, an Argand or other suitable burner may be used.

For street lighting or in other places open to drafts I provide a hood Zto form a cover for the perforated zone 9. By these means atmospheric air to support combustion is supplied to the burner through the interstices of the gauze over the globe and the products of combustionfind their exit through the chimney, but access of vapors or gases to the flame directly is prevented and danger of ignition I of any such floating vapors is avoided. The

inflowing currents of air serve to reduce the temperature of the globe and the continuously-ascending current of air passing between the chimney and the surrounding cylinder by impeding radiation of heat from the burner through the chimney keeps down the heat of the chimney itself and generally improves the operation of the lamp.

The combustion supporting air current supplied to the burner by its passage through the lantern becomes heated and better prepared and adapted to its purpose.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a lamp for burning illuminating-gas, the combination of the translucent globe I) closed at its lower end, the burner 6 arranged in the lower portion of said globe and connected with a gas-supply pipe, a translucent chimney d surrounding said burner and eX- tending above the said globe, a gauze collar 9 arranged on the upper end of the globe, a

cylinder h of slightly greater diameter thanthe chimney fitted on the gauze collar and surrounding the said chimney, and a perforated hood arranged on the upper end of said cylinder, substantially as described.

2. In a lamp for burning illuminating-gas, the combination of the translucent globe I) closed at its lower end, the burner e arranged in the lower portion of said globe, a Bunsen burner arranged beneath said burner, a gassupply pipe connected 7 with the Bunsen burner, a translucent chimney d surrounding the gas-burner and extending above the said globe, a gauze collar 9 arranged on the upper end of the globe, a cylinder h fitted on the gauze collar and surrounding the chimney, and a perforated hood arranged on the upper end of said cylinder, substantially as described.

3. In a lamp for burning illuminating-gas, the combination of the translucent globe I) closed at its lower end, the burner earranged in the lower portion of said globe and connected with a gas-supply pipe, a translucent chimney d surrounding the gas-burner and extending above the said globe, a gauze collar g arranged on the upper end of the globe, an imperforate cap fixed on the upper end of said collar and terminating in a contracted cylinder h surrounding the upper portion of the chimney, and a perforated hood arranged on the upper end of said cylinder, substantially as described.

In testimony whereof I have I hereunto set my hand in presence of two subscribing witnesses.

THEODORE BIRNBAUM.

Witnesses:

FRED O. HARRIS, WALTER J. SKERTEN. 

